cae·​si·​ous | \ˈsēzēəs, ˈkī-\

Definition of caesious 

: having a blue color very low in chroma

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First Known Use of caesious

1798, in the meaning defined above

History and Etymology for caesious

Latin caesius; probably akin to Latin caelum sky

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The first known use of caesious was in 1798

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to clear from alleged fault or guilt

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